Table 2

Analysis of persistence by Kaplan–Meier and Cox regression (univariate analysis)

GA (n=54)IFNβ1a-sc (n=47)IFNβ1a-im (n=73)IFNβ1b-sc (n=50)Overall (n=224)
Median, days138177117209921349

 95% CI
413.8 to 2348.2377.4 to 1164.61196.8 to 2243.284.6 to 1899.41017.4 to 1680.6
Interruption percentage (%)51.874.541.16455.8
Probability of persistence (%)
 6 months88.791.595.99091.9
 1 year84.878.690.079.683.9
 3 years55.943.667.346.854.6
 7 years12.221.528.122.923.1
HR1.41.7Reference1.6
 95% CI0.85 to 2.381.02 to 2.721.00 to 2.68
 p Value0.180.040.06
  • GA, glatiramer acetate; IFNβ1a-im,intramuscular interferonβ1a; IFNβ1a-sc,subcutaneous interferonβ1a;IFNβ1b-sc,subcutaneous interferonβ1b.